Merge pull request #6683 from fpoy/FEAT_Test_ResponseTest_setLastModified

Author: MGatner

tests/system/HTTP/ResponseTest.php

@@ -243,9 +243,10 @@ public function testSetLastModifiedWithDateTimeObject()
     {
         $response = new Response(new App());
 
-        $response->setLastModified(DateTime::createFromFormat('Y-m-d', '2000-03-10'));
+        $datetime = DateTime::createFromFormat('Y-m-d', '2000-03-10');
+        $response->setLastModified($datetime);
 
-        $date = DateTime::createFromFormat('Y-m-d', '2000-03-10');
+        $date = clone $datetime;
         $date->setTimezone(new DateTimeZone('UTC'));
 
         $header = $response->getHeaderLine('Last-Modified');